FLOJET quad II diaphragm 4125 series User manual

4.75
(120)
3.5
(90) 3.44 (87)
“Quad II Diaphragm”
Models4125 Series
Bilge Pump
FEATURES
• Self-Priming
• Dry Running
• Soft, Noise Absorbing Mounts
• 300 Gallons Per Hour
• Corrosion Resistant Materials
• Models Meet U.S.C.G. Electric Standards
SPECIFICATIONS
Motor: Permanent Magnet, Ball Bearings on both
Front and Rear Endbells. CE Models are fully
suppressed.
Pump: Four chamber diaphragm positive displace-
ment design; Self-priming up to 6 ft. suction
lift; Pump able to run dry without damage;
Removable port to hose connectors.
(Available on 12 & 24V d.c. Models)
Your “Quad II” pump is designed to self-prime up to 6
feet suction lift (vertical distance from bilge pick-up to
pump inlet). The maximum recommended discharge
head (distance outlet is above pump) is 15 feet. It is
recommended you utilize an automatic on-off switch so
that the pump is turned off when not in use. The “Quad
II” is able to run dry (no liquid) for extended periods,
however, this could cause needless battery drain.
OPERATION
Pump Series Dimensions - Inches (mm) Weight
Height Width Length lb. (kg)
4125-XXX 3.75 (95) 6.3 (160) 9.2 (234) 6.0 (2.8)
AMP DRAW FLOW
MODEL* VOLTS @ 10 psi (0.7 bar) GPM (l/min)
4125-114 12V dc 8.5 5.0 (18.9)
4125-314 24V dc 3.6 5.0 (18.9)
4125-343 32V dc 2.8 5.0 (18.9)
* CE fully suppressed models are identified by a prefix “R” and a CE mark on the label. (i.e. R4125-314).
Self Declaration Of Conformance (SDOC) is available upon request.
Model 4125 Series

STEP 1
Remove shipping plugs from Quad pump ports. Some
water from factory testing may spill out.
STEP 2
Install inlet A and discharge B port connectors. Slide
clips toward rear, install ports and firmly push slide clips
C forward to lock port connectors in place.
STEP 3
Slide rubber mounts fully into 4 mounting tracks.
STEP 4
Mount pump vertically, with pump head down or
horizontally in an accessible location (pump is not
submersible). If mounting vertically, motor up, attach
motor mounts first, then pump head mounts, while
supporting weight of pump.
STEP 5
Use 3/4”’ I.D. flexible hose (preferably braided or
reinforced). Use hose clamps on the slip-on barb hose
connections. Use of reinforced vinyl hose is recom-
mended.
STEP 6
Install a Flojet #01610-000 strainer in an accessible
location (for inspection and cleaning) between the bilge
pick up and pump inlet. This strainer or equivalent is
required for pump warranty to be valid.
STEP 7
Installation of a screen on the bilge pick up will require
less strainer cleaning.
INSTALLATION
STEP I
Use 14 gauge stranded wire to 20’, 12 gauge to 50’,
from power source.
STEP 2
Use a 15 amp rated on-off switch on the (+) positive (red)
motor lead.
STEP 3
Install 15 amp fuse protection on the switched (+)
positive lead for 12 volt -114 model; use 10 amp fuse on
24 volt -314 model; and 5 amp fuse on 32 volt -414
model.
WIRING
Fuse
(+)
Switch
Battery
(–)
Black (–)
Flojet
Bilge Pump
Flojet Inlet
Strainer
B
A
C

DISASSEMBLE
Upper Housing
1. Loosen but do not remove four pump head screws and
carefully remove upper housing assembly (1)
2. Inspect check valve (2) for debris
3. Reassemble new upper housing (1)
Check Valve Assembly
Follow step 1
3. Replace check valve (2)
4. Reassemble upper housing (1)
Lower Housing, Diaphragm, Motor
Follow step 1
3. Rotate lower housing (4) so mounting notch opening on lower
housing exposes set screw which holds bearing housing to
shaft.
4. Loosen this setscrew by inserting wrench 1/8” Allen wrench
into mounting notch opening. Then, slide lower housing (4) off
motor shaft.
Diaphragm Cont’d
5. Loosen four cam piston screws with Phillips head screw
driver and pull apart cam from inner pistons. (Pistons should
always be replaced when a new diaphragm is installed.)
Motor Cont’d
5. Replace Motor
REASSEMBLE
Motor
1. Reassemble lower housing assembly (4) to motor. (Follow
steps 4 to 10.)
Diaphragm
2. Lower housing is assembled with:
• Flat side of diaphragm and outer pistons facing motor
• Hex stem of inner pistons must be aligned-Into hex holes in-
outer pistons (4).
• Outer pistons must be aligned with alignment slots on cam
assembly making sure screw holes align in cam assembly,
otherwise diaphragm will leak
3. Tighten cam piston screws partially, center piston in
diaphragm, then tighten screws securely (18 in. lbs. torque)
Lower Housing
4. Reassemble lower housing assembly (4) to motor.
5. Retighten set screw securely. Set screw head must be
positioned facing motor covering seam (indentation).
(Positioning of this screw is critical to avoid misalignment and
subsequent diaphragm damage.)
Upper Housing Check Valve
6. Reassemble upper housing (1)
7. Properly seat O-Ring in check valve assembly (2) and check
if ferrules and screen are in place on upper housing (1)
8. Install check valve (2) into upper housing (1) and push in.
9. Assemble on to lower housing (4), align 4 screws on to motor
by rotating lower housing (4) if necessary to align feet
10. Tighten screws evenly to 30 in. lbs. torque.
TROUBLESHOOTING
WARNING: BEFORE SERVICING PUMP, TURN OFF PUMP AND DRAIN WATER FROM SYSTEM!!
Failure to Prime - Motor operates, but no pump discharge
• Check and clean inlet strainer (make sure bilge pick up
is clear)
• Restricted intake or discharge line
• Air leak in intake line
• Debris in pump
• Punctured pump diaphragm (pump leaks)
• Crack in pump housing
Motor falls to turn on
• Loose wiring connection
• Pump circuit has no power
• Blown fuse
• If motor has power and still won’t turn, either the motor has
failed or there is mechanical failure in the lower housing
• Check D.C. voltage at the motor.
Low Flow and Pressure
• Air leak at pump intake
• Accumulation of debris inside pump and plumbing
• Worn pump bearing (excessive noise)
• Punctured pump diaphragm (pump leaks)
• Defective motor
• Inspect check valves (item 2) for debris
21
4 7 Includes items 1 thru 49 6
3 5
Quite often when a pump is worn or defective the one failed component has overburdened others. To avoid frequent aggravating
repairs, Flojet offers service kit assemblies making repairs as quick and easy as possible.

Pump Series Strainer Number Inlet Outlet Screen
4125-XXX 1740-000 3/4 Barb 3/4 Barb 40 Mesh
1740-101 3/4 Barb Quad Plug-in 40 Mesh
STRAINERS
ACCESSORIES
20381-002
QUAD PORT x
1/2" HOSE BARB
STRAIGHT
20381-000
QUAD PORT x
3/4" HOSE BARB
STRAIGHT
20381-000
QUAD PORT x
GARDEN HOSE
ADAPTOR
20381-000
QUAD PORT x
1/2" HOSE BARB
90°ELBOW
20381-000
QUAD PORT x
3/4" HOSE BARB
90°ELBOW
QUICK CONNECT PORT SYSTEM
UNITED KINGDOM
Jabsco/Flojet
Bingley Road, Hoddesdon
Hertfordshire EN11 OBU
Tel: [phone]
Fax: [phone]
CANADA
Fluid Products Canada
55 Royal Road
Guelph, Ontario N1H 1T1
Tel: [phone]
Fax: [phone]
JAPAN
NHK Jabsco Company Ltd.
3-21-10, Shin-Yokohama
Kohoku-Ku, Yokohama, 222
Tel: [phone]
Fax: [phone]
U.S.A.
Flojet
20 Icon
Foothill Ranch, CA 92610-3000
Tel: [phone]
Fax: [phone]
GERMANY
Jabsco GmbH
Oststrasse 28
22844 Norderstedt
Tel: [phone]
Fax: [phone]
© Copyright 2001, ITT Industries Printed in U.S.A. All Rights Reserved Form: 81000-083 11/01
BILGE PUMP SERVICE PARTS
WARRANTY
FLOJET warrants this product to be free of defects in material
and/or workmanship for a period of one year after purchase by the
customer from FLOJET. During this one year warranty period, FLOJET
will at its option, at no charge to the customer, repair or replace this
product if found defective, with a new or reconditioned product,
but not to include costs of removal or installation. No product will
be accepted for return without a return material authorization num-
ber. All return goods must be shipped with transportation charges
prepaid. This is only a summary of our Limited Warranty. For a
copy of our complete warranty, please request Form No. 100-101.
RETURN PROCEDURE
Prior to returning any product to FLOJET, call customer service for
an authorization number. This number must be written on the
outside of the shipping package. Place a note inside the pack-
age with an explanation regarding the reason for return as well
as the authorization number. Include your name, address and
phone number.
MODEL#
KEY# DESCRIPTION 4125-114 4125-314 4125-414
0 Service Kit* 20409-054 20409-054 20409-054
1 Upper Housing With Clips 20404-005 20404-005 20404-005
2 Check Valve Assembly 20407-010 20407-010 20407-010
3 Diaphragm Assembly (includes screws) 20403-050 20403-050 20403-050
4 Lower Housing Assembly 20419-003 20419-003 20419-003
5 Motors 2009-080A 2019-027A 2019-026A
Motors CE Models R2009-080A R2019-027A —
6 Ports - 3/4 Barb (pair) 20381-012 20381-012 20381-012
Ports - 3/4 Garden Hose (pair) 20381-013 20381-013 20381-013
7 Pump Head Assembly 20406-005A 20406-005A 20406-005A
8 Side Clips (pair) 20408-000 20408-000 20408-000
*Service Kit includes #2, #3, #8 and drive cam assembly.
The above part numbers are packaged with 2 fittings per bag.